AERMEC Variable Multi Flow ANL 580 - Routine Maintenance; Refrigerant Circuit

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18.03. 5719210_03
ANL / 290-650
EN
 
 

 
Toavoidexcessivecompressorstartstwofunconsare
provided.
- MinimumtimecompressorisOFF180seconds.
- MinimumtimecompressorisON120seconds.
 
Thewiringschemacprovidesoutputstocontrolthe
circulangpumps.Thesystempumpstartsimmediate-
lyandaer40secondsofoperaon,whenthewater
owisstabilised,thepressuredierenal/owswitch
controlfunconisenabled.Ifnoalarmsarepresent
theunitwillstart.
 
Thealarm
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isalwaysacveeveninstandbymode.
Topreventdamagetotheplateheatexchangerby
freezingofthewaterwithintheunitisstoppedand
analarmraisedifthewatertemperaturedropsbelow
theminimuman-freezesetpointof3°C.Theunitcan
onlyre-startaeramanualresetandifthean-freeze
sensorreadsawatertemperatureabove4°C
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.With
theunitinomodeandwithawatertemperature
below4°Cthefactoryedelectricheatersonthe
heatexchangerareturnedon,andturnedowhen
thewatertemperatureexceeds5°C.Thewaterpump
alwaysremainsacve.
 
Theunithasalowwaterowratealarmusingafac-
toryeddierenalpressureswitchorowswitch.
Thissafetyacvatesaertherst40secondsofpump
operaonifthewaterowrateisnotsucient.The
operaonofthisalarmstopsthecompressorsandthe
pump.

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Theanti-freezesetpoint
canonlybeadjustedbyan
authorisedservicecentreand
onlyafterverifyingthatthe
hydrauliccircuithasthecor
-
rect%ofanti-freezesolution.
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Ifthisalarmoccursimmediate-
lycalltheauthorisedtechnical
serviceassistance.
 
Itisforbiddentocarryoutanycleaningoperation
beforeisolatingfromthepowersupply
1
.
Confirmnovoltageispresentbeforecommencing
works.
Periodicmaintenanceisafundamentalrequirementto
ensureefficientunitoperationbothintermsofopera-
tionandenergyefficiency.

 

1. Watercircuitisfilled.
2. Waterfilterisclean.
3. Operationofthedifferentialpressureorflow
switch.
4. Absenceofairinthesystem(vent).
5. Waterflowrateisalwaysconstantthroughthe
evaporator.
6. Conditionofthehydraulicpipinginsulation.
7. Thepercentageofanti-freezeliquid,asmaybe
required
 

1. Operationofsafeties.
2. Powersupplyvoltage.
3. Electricalpowerinput.
4. Tightnessofconnectionsandterminals.
5. Operationofthecompressorcrankcaseheater.
 

1. Stateofcompressors.
2. Efficiencyoftheplateheatexchanger.
3. Operatingpressures.
4. Leakstoconfirmthecorrectoperatingrefriger-
antcharge.
5. Operationofthehighandlowpressurepres-
sostats
6. Efficientoperationofthefilterdrier.
 

 ofcompressorsandelectri-
calpanelandexternalpanellingoftheunit.Poor
fixingscausenoiseandabnormalvibrations.
2. Thestateoftheunitstructure.
Treatanypartsshowingsignsofcorrosionwith
theappropriatepaintstoreduceoreliminate
rust.
 
TheANLunitsarefactorychargedwithR410Aand
tested.Innormaloperationtheythereforedonot
requireanyinterventionfromthetechnicalassistance
serviceinrelationtotherefrigerantcharge.Overtime
somesmallleakscanappear,causingdischargingthe
circuitandcausingamalfunctionoftheunit.Inthis
casetheleakshavetobefoundandrepairedandthe
unitrechargedinaccordanceandasrequiredunder
currentlegislationandgoodworkingpractices.
 
Ensurethatthedisposaloftheunitiscarriedoutin
accordancewiththecurrentlegalrequirements.
WARNING
Werecommendaservicelogbookis
providedfortheunit(responsibility
oftheuser)tokeeprecordsofany
worksontheunit,whichwillaid
maintenanceandrepairworks.Note
intheservicelogbookdate,typeof
works(routinemaintenance,inspec-
tionorrepair),describingtheevent
andthemeasurestaken.

Itistochargewith
refrigerantcircuitwitharefrigerant
typedifferenttothatindicated.Us-
ingadifferentrefrigerantcancause
seriousdamagetotheunit.